2610950 - MPX Writer hang on double ABORT deadlock - SAP IQ 

• Writer hang
• IQMSG stops logging 
• No error in IQMSG
• No new connection can be established.
• No stack trace.

pstack would show this sequence of functions

__lll_lock_wait
_L_lock_854 ()
pthread_mutex_lock (
hos_ABORT(char const*, unsigned int, char const*, char*, char*)
SigHndlr
hos_strncat(char*, char const*, unsigned long, hos_dmcontext*)
ucstkgenPrintheading(int, int)
DumpAllThreads(char const*, unsigned int, int)
hos_ABORT(char const*, unsigned int, hos_exception const&, char*, char*)
Throw(hos_exception const&)
hos_assertexception::ThrowException(char const*, int, hos_assertexception::errors)
st_ErrorQueue::~st_ErrorQueue()
st_SAIQInterface::~st_SAIQInterface()
st_connection::~st_connection()
st_iqctl::DestroyConnection(UIConnection*, st_connection*)
UIQCtl_DestroyConnection

SAP IQ 16.0 SP 11 PL 17
SAP IQ 16.0 SP 11 PL 18

CR813710, CR#813710, 813710,  hos_ABORT, dead, lock, Multiplex, stacktrace, stktrc , stack trace , KBA , BC-SYB-IQ , Sybase IQ , Problem